Improved trip-hammer



' eii'ort on; the-'part of the ppemfon vUNITED"v STATES PATENT (')FFICaA T. -.VI. Roer,- or GALENA, ILLINOIS. f'

IMPaovED TRIP-HAMMER.

l Specification forming part of Letters Patent N o. 46,267, dated February 7, 1865.

This invention consistsin attaching: .:herodv cfa hammer to arock shaft o r head, which is connected by means of a bent arm and lrod to a'treadle, the treadlerod having a spring applied -to it and all arranged in such a manner thatthe operator, by meausof his foot acting upon the treadle, is .l enabled to give thev proper movement tothe hammer, the latter after giving its' stroke quickly rising-and op 'erating 'smoothly throughout v.without`` any irregzulag` movement and with but' afxno'derate To enable thoseV skilledfin theiart' tofully understand and construct ,my-ii ention, I willproceed to'describe'it. l l 4 A represcntsa fra'mving,ionfthe upper -part .ofwhich there'isttedin'suit-able bearings a4 rock-shaft orfrookhea-d, B, in which thev rod "U ofthe hammer D issecured by a screw,`a. E isan anvil, on which the Work isplaced -for the hammer to act upon, and F is a treadle,` 1 which is placedin the lower'part of the -framing A, and is attached to fa, shafaai". This4 l .treadle F maybe constructed in the form of` a frame, soy as to extend around the anvil. In

the back part of the treadlel` there isftted la shaft, G, which is allowed to turnfreelyon being a vertical a rod, H, Secured init by a set-screw, b. The upper end of rod H is connected by a joint, c, to the cuter end of a bent arm, I,

the lower end of which rests upon 'ab adjustablehub, K, on saidl rod, the'upper end ofthe spring bearing against an arm, lL, which pron jects from the framing A. y

From the above. descrlptionft Wllbemeen that when theffront end of. the treadle F. is pressed down the rear'will be moved upward and the hammer D Iforced down by the action ofthe rod Hand arm I onthe rock-shaft B. As the hammer is forced down' the spiral spring J is compressed, and v(':onsequently gives, when the'tre'alle is relieved from the pressure of the foot at the termination of the upward movement of its front end, a quick rising movement to the hammer, and the latter f is made .to operate rapidly and smoothly without any jarsor copcussions, and with but .a moderate expenditure of power.

I `Having thus described my invention, what [I claim as new, and desire to secure-by -Letters Patent,Is'---` v tahed, in combination with thel knucklejointed arm HI, providedwiththe spiral spring;y J and treadle F, all constructed land arranged,

to operate as and for the 'purpose herein set forth. y.

.''Witnesses; I

. M. WERTENBERGEm y S. CUNNINGHAM..

journals, and! this shaft has the lower endet' which pro-v jects from the rearof the rockshaftfl Onv the rod H there is placed a spiral spring-J,-

The rock-shaftBf-with'.hammer-rod C.` at-` fr. J. noo'r.- 

